1 - 20 of 1,435 Works in Ecto-Tongue (Undertale)
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Heat of the Moment by FandomWorld9728
Fandoms: Undertale (Video Game), Swapfell red - Fandom, Fellswap Gold - Fandom, Underswap - Fandom, Swapfell - Fandom
10 Sep 2025
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Summary
Being half demon and half human was hard. It affected your life in interesting and traumatic ways. Luckily for you, you had a pair of skeletons who would help you through whatever life threw your way. Only, things got more complicated when different versions of them began to show up.
Series
- Part 9 of Undertales Across the Multiverse
- Part 9 of Papyrus/Reader Fics
- Part 7 of Sans/Reader Fics
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Undertale / UTMV sanscest hypnosis oneshots by Chris_ghosty77
Fandoms: Undertale (Video Game)
10 Sep 2025
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Summary
My first work, a book of oneshots focused on hypnosis / mind control.
Most stories will be non/dub-con so be careful.
Almost any ships, focused on sanscest.
Edit: The number of tags being limited, please read the summary of each chapter to know the warnings / kinks. I hope you enjoy reading this book as much as I love writing it.Series
- Part 1 of Undertail hypnosis series
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How To Make A Fully Loaded Caramel Apple Pie With White and Dark Chocolate Drizzle<3 by WhittneytheScorpionSuccubus for Mochimunchies
Fandoms: Undertale (Video Game)
07 Sep 2025
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I'm sorry if I'm taking so long, I want to make sure this sweet baby is well cooked and fucking delicious!<3 >:3c
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When you were ten years old, your parents sent you to stay with a relative of yours from Ebott. Their villa was situated up on the mountainside, and you loved to explore the forestry. One day the ground gave out and you fell Underground, and faced terrors beyond your imagination. You were missing for weeks.
After you managed to miraculously return to the surface, your parents were relieved - but deeply troubled by your 'delusional ramblings'. They were convinced you were 'crazy', and feared how that would reflect on their reputation. Your doctors advised sending you to an in-patient psychiatric facility, which is where you spent the next few years in intensive therapy and counseling.
15 years later, you're a young adult with a somewhat manageable grip on life. You keep your head down, attend the social events that are expected of you, and try to be as unnoticeable as possible. Your parents arranged a suitor for you, and you're to be wed within the next year.
That is, until, those monsters your parents and doctors tried to convince you weren't real suddenly crawled out from the Underground. And they're a lot different from what you remember.
[[Underfell!verse.]]
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The dichotomy between black and white is your constant when it's time for you to meet the whole new civilization Frisk brought along with them to the Surface.
As a parent, it's not easy to trust others when they've hurt your child.
So when that new civilization decides they owe Frisk both for saving their kind and for still hurting them during that process, you've got plenty to say to them.
Forgive as easily as you once did with others during a stage of naivety? Oh, hell no.
They better have a good reason for hurting your child and an even better one for wanting to be a part of their family.
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Full Arc List:
Arc 1 | Ruins
Chapters 1 to 15 (✓ complete)
Arc 2 | Enemy Approaching
Chapters 16 to 25 (✓ complete)
Arc 3 | Pathetic House
Chapters 26 to 30 (× current)
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(Important Notice: If this work seems familiar, it was originally published in 2020, but was deleted due to various health issues!)
(OLD WRITING LASTS UNTIL CHAPTER 25.)
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Two travellers running from their own minds meet on a precarious cliffside. Do they find comfort in one another or is everything going to go to hell?
Series
- Part 2 of I Hate That I Love You
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Error lost one fight after another to the Star Sanses. The Universes and code problems kept piling up, and despair drove him to do anything. He tried everything—different strategies, plans, traps, code combinations—but nothing worked, and he remained stuck, with unfinished work and voices behind him.
Until one day, he was embarrassed to discover that suddenly, after so much magic had been spilled by him and his enemies during fights, he could... Invoke a certain, intimate part of the ectobody without their knowledge and influence it as he pleased. Of course, Error was not going to use this! No way! He had principles! Pride, after all!
But... Every day it became more and more difficult, and no other options appeared. And if he could overcome his embarrassment and shame, then maybe it would be worth it?..
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this is a collection of underswap papyrus x reader smut from my main book 'First the dead rise and now SKELETONS?
this can be read as a stand alone smut book as I'll try to keep any major spoilers out of it but some scenes may be confusing without context
I kept the gender and description of the reader ambiguous so it can be read by everyone of any genderSeries
- Part 2 of Into the apocalypse
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You've been living in Snowdin for a couple months now, taken in by a pair of friendly skeletons, a bubbly short one and a chill tall one. Things are going well up until Papyrus starts acting strangely. Why does he keep avoiding you? Why is he acting so possessive? And why won't he tell you what's wrong?
(A short, self-indulfent warm-up fic I'm doing to get back into writing. :)
will try my best to update somewhat regularly but we'll see. my or may not turn this into a series of one-shots.) -
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Red finally, finally gets Sans to agree to a fun time in bed. They have a great time together! Then Sans goes and works himself to the bone before finding the courage to invite Red to see a meteor shower. Who knew he'd learn Red's deepest secret while under the stars?
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Razz, the young Prince of the Fell Kingdom, embarks on a transformative journey as he marries Sheikh Honey of the Tale Kingdom. This union, forged through necessity and sealed with magic, marks Razz's transition into adulthood. As he navigates his new life, he grapples with the complexities of being the second wife to Honey, sharing his affections with the enigmatic first wife, Sans. Their initial interactions are fraught with tension and misunderstandings, as Razz strives to forge a bond with Sans amidst the challenges of his newfound role.
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- Part 2 of Dance of Ice and Fire
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When you find yourself somehow having traveled to the world of undertale how do you handle all the hot skeletons?
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Papyrus loves Sans, perhaps more than a brother should
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Lust is the most prized escort in town, with a Boss no one has ever seen and who's the subject of many rumors. Red and Sans are both heirs to the two most powerful mafia families in town. What happens when they're accidentally booked with Lust together ? And are they truly the ones in control ?
(Content warnings in the tags)
Series
- Part 13 of Undertail hypnosis series
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Nightmare has always been distant from his gang for multiple reasons. But deep down, he does love them. How does he show his affection towards them while having plausible deniability? Sex.
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Dream felt nervous.
He was usually the optimistic one, always seeing the bright side of things. But tonight, something felt off.
The house was silent. Nightmare had been working late hours recently, leaving Dream to eat dinner alone, but this wasn't loneliness creeping in. This was fear.
He didn’t like being separated from his twin. Not now. Not when everything was so wrong.
Not when he knew he was being watched.
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AKA Dream and Nightmare getting stalked by our two lovable boys, Killer and Cross <3 haven't written a fanfic in years so this might be ass. Also title is inspired by the song with the same name!!
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A rewrite of a previous fic, changed structure and story and more Sans' to have sex with.
Years have passed since the barrier had fallen and freed the monsters. You had your found family with them, Sans in particular being your best friend and support. You heard of SOULmates and how monsters have them, you wondered yourself if humans also had SOULmates, and you find out as you begin to travel through different Undertale AU's just how SOULmates and SOULs work through the multiverse.
*I DON'T USE Y/N*
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The Sacrificial Skeleton and the Labyrinth of Gods by this_is_my_alt
Fandoms: Undertale (Video Game)
11 Aug 2025
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Summary
As a necromancer, you’re used to suspicious stares and whispers of heresy from the townsfolk. It only gets worse after you’re killed and walk Ebott Empire as an undead skeleton. When you hear rumors of a strange settlement that worships the undead, it’s too tempting to resist. The locals treat you better than you’ve ever been treated. That is, right until the moment where you’re dressed up and tied to an altar as a sacrificial bride for their skeleton gods.
Despite their advanced technology and magical prowess, you’re doubtful of their divinity. What kind of gods blush whenever they see a bit of bone?
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So you got woken up in the middle of the night by your new neighbors... no biggie! You're sure they're just excited to be in a new (cheap) apartment. So you decide to introduce yourself to them when they get settled in.
But to your surprise, your new neighbor just so happens to be a skeleton!
"Oh!" You say, surprised by your neighbor's appearance, "Uh hey! Welcome to the unit, I'm your neighbor"
"oh! hey i'm sans" He smiles, lazily copying your initial reaction.You hold your hand out to shake, he looks at your hand for a moment before accepting it.
when all of a sudden...
PPPPPPRRRT!
Was that a... whoopie cushion in his hand?
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You ran away. You couldn't face your dark past, it was to much for you. You moved to Ebott City to start a new life. Swearing off friends and relationships all together. Or so you thought...Two skeleton brothers move in next to you. You can't help but be drawn into the shorter of the two. Will you let him in to help you with your haunting past? or will you run again when your past catches up to you
Updates on Sundays/Mondays!
A short break every 5 chapters :)